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A new capillary electrophoresis procedure with field-amplified sample stacking (FASS) concentration for analysis of three aconitine alkaloids has been established using 1-butyl-3-methylimidazolium-based ionic liquids as the electrolyte solution. The use of a short water plug at the column inlet is essential for improving the reproducibility of FASS with electrokinetic injection, and the water plug...
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